﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Example_sharp_virtual_and_abstract
{
    class Program
    {
        static void Main(string[] args)
        {
            SayHello helllo = new SayHello();
            helllo.speak();
            helllo.goodbye();
        }
    }
}
